/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.testutils.metrics;



import com.bff.gaia.unified.sdk.metrics.Distribution;

import com.bff.gaia.unified.sdk.metrics.Metrics;

import com.bff.gaia.unified.sdk.transforms.DoFn;



/**

 * Monitor that records processing time distribution in the pipeline.

 *

 * <p>To use: apply a monitor directly after each source and sink transform. This will capture a

 * distribution of element processing timestamps, which can be collected and queried using {@link

 * MetricsReader}.

 */

public class TimeMonitor<T> extends DoFn<T, T> {



  private Distribution timeDistribution;



  public TimeMonitor(String namespace, String name) {

    this.timeDistribution = Metrics.distribution(namespace, name);

  }



  @ProcessElement

  public void processElement(ProcessContext c) {

    timeDistribution.update(System.currentTimeMillis());

    c.output(c.element());

  }

}